Chip Resistors-Surface Mount

Part Number	Description / PDF	Quantity
ESR25JZPF1802 ROHM Semiconductor	RES SMD 18K OHM 1% 2/3W 1210	0
MCR100JZHJ563 ROHM Semiconductor	RES SMD 56K OHM 5% 1W 2512	306
TRR01MZPF2322 ROHM Semiconductor	RES SMD 23.2K OHM 1% 1/16W 0402	11320
KTR10EZPF6811 ROHM Semiconductor	RES SMD 6.81K OHM 1% 1/8W 0805	7875
ESR18EZPJ273 ROHM Semiconductor	RES SMD 27K OHM 5% 1/2W 1206	743
MCR10ERTFL3R00 ROHM Semiconductor	RES SMD 3 OHM 1% 1/8W 0805	183
ESR10EZPF1304 ROHM Semiconductor	RES SMD 1.3M OHM 1% 0.4W 0805	0
KTR10EZPF1211 ROHM Semiconductor	RES SMD 1.21K OHM 1% 1/8W 0805	0
ESR25JZPJ270 ROHM Semiconductor	RES SMD 27 OHM 5% 2/3W 1210	211
MCR18ERTJ1R2 ROHM Semiconductor	RES SMD 1.2 OHM 5% 1/4W 1206	4450
KTR10EZPF4300 ROHM Semiconductor	RES SMD 430 OHM 1% 1/8W 0805	6165
ESR10EZPF6R81 ROHM Semiconductor	RES SMD 6.81 OHM 1% 0.4W 0805	2308
ESR18EZPJ750 ROHM Semiconductor	RES SMD 75 OHM 5% 1/2W 1206	1555
ESR10EZPF1582 ROHM Semiconductor	RES SMD 15.8K OHM 1% 0.4W 0805	0
TRR01MZPF3831 ROHM Semiconductor	RES SMD 3.83K OHM 1% 1/16W 0402	21604
MCR03ERTJ131 ROHM Semiconductor	RES SMD 130 OHM 5% 1/10W 0603	497
MCR10ERTF16R5 ROHM Semiconductor	RES SMD 16.5 OHM 1% 1/8W 0805	0
MCR10ERTF2671 ROHM Semiconductor	RES SMD 2.67K OHM 1% 1/8W 0805	1980
KTR18EZPF2103 ROHM Semiconductor	RES SMD 210K OHM 1% 1/4W 1206	0
ESR18EZPF1004 ROHM Semiconductor	RES SMD 1M OHM 1% 1/2W 1206	0

Chip Resistors-Surface Mount

1. Overview

Surface Mount Chip Resistors (SMD Resistors) are passive electronic components designed to limit current flow and divide voltages in printed circuit boards (PCBs). As key elements in Surface Mount Technology (SMT), they enable high-density PCB layouts and automated manufacturing. Their miniaturized footprint and reliability make them essential for modern electronics, including smartphones, automotive systems, and industrial equipment.

2. Main Types and Functional Classification

Type	Functional Characteristics	Application Examples
Thick Film Resistors	Cost-effective, standard tolerance ( 1%-5%), power ratings up to 1W	Consumer electronics, power supplies
Thin Film Resistors	High precision ( 0.01%), low noise, stable temperature coefficients	Medical devices, precision instrumentation
Power Resistors	High power dissipation (up to 3W), robust thermal management	Motor drives, EV battery management systems
Network Resistors	Multiple resistors in single package, matched temperature coefficients	Digital circuits, memory modules
Wirewound Resistors	High inductance, precise low-resistance values	Audio amplifiers, industrial control systems

3. Structure and Composition

Typical SMD resistors consist of: - Ceramic substrate (Alumina, 96% Al₂O₃) - Resistive layer (Ruthenium oxide for thick film, Nichrome for thin film) - Termination electrodes (Ni/Sn or Ag/Pd metallization) - Protective coating (Epoxy or glass encapsulation) Standard packages follow EIA dimensions (e.g., 0402, 0603, 0805).

4. Key Technical Specifications

Parameter	Description	Importance
Resistance Range	1 to 10M (film), 0.1 to 100k (power)	Determines current control capability
Tolerance	0.01% (precision) to 5% (general)	Impacts circuit accuracy
Power Rating	0.05W to 3W @ 70 C	Defines thermal dissipation limits
TCR	5ppm/ C (thin film) to 200ppm/ C	Affects stability over temperature
Operating Temp	-55 C to +155 C	Defines environmental reliability
Voltage Coefficient	<0.1ppm/V	Ensures voltage stability

5. Application Fields

Consumer Electronics: Smartphones, wearables, IoT devices
Automotive: ADAS sensors, battery management systems, ECUs
Industrial: PLCs, motor drives, power converters
Telecom: 5G base stations, optical transceivers
Medical: Diagnostic equipment, implantable devices

6. Leading Manufacturers and Products

Manufacturer	Representative Series	Key Features
Yageo	CRCW Series	0.05W-1W, 0.1% tolerance
Vishay	CRCWE Series	Thin film, TCR 25ppm/ C
ROHM	MCR Series	Power resistors up to 2W
Ohmite	PWR Series	High-power 3W devices
Bourns	CRCU Series	Network resistors with 8-element arrays

7. Selection Recommendations

Consider: - Required resistance tolerance and power rating - Operating temperature range (automotive needs -40 C to +125 C) - Package size constraints (e.g., 0402 for mobile devices) - Long-term stability requirements (medical applications prefer thin film) - Cost vs. performance trade-offs (consumer vs. industrial use) Example: For smartphone power management, select 0603 thick film resistors with 1% tolerance and 125 C rating.

8. Industry Trends

Key trends include: - Miniaturization: Development of 0201 and 01005 packages - Higher precision: Sub-0.01% tolerance thin film resistors - Enhanced thermal management: New materials for power densities >1W/mm - Automotive growth: AEC-Q200 qualified parts for EVs - Smart manufacturing: AI-driven resistor selection tools - Sustainability: Lead-free and halogen-free material adoption